Dumbbell shelf rack



FIG. 1 is a perspective view of a dumbbell shelf rack showing my newdesign;

FIG. 2 is a side view thereof, the opposite side being a mirror image;

FIG. 3 is a top view thereof;

FIG. 4 is a front view thereof; and,

FIG. 5 is a back view thereof.

The ornamental design for a dumbbell shelf rack, as shown and described.